Share 'Chemical questions for those who might know'

 I need to but Oxalic acid,  and potassium permanganate, and need to know were to look.   I also  have to age some brand new largish nuts and bolts to fit with the age of these 80 year old Kay Krafts that I am constantly working on. I would imagine that they are chrome? Should I be purchasing a wire wheel for my cordless drill and clamping them into the vice and starting the process with that, or…